doc: warn about digit group separators in scientific notation (#704, #706)

[ci skip]

hledger-lib/hledger_journal.5

@@ -401,7 +401,12 @@ groups
 decimal part can be separated by comma or period and should be different
 from digit groups separator
 .IP \[bu] 2
-scientific E\-notation (without digit groups) is allowed
+scientific E\-notation is allowed.
+Be careful not to use a digit group separator character in scientific
+notation, as it's not supported and it might get mistaken for a decimal
+point.
+(Declaring the digit group separator character explicitly with a
+commodity directive will prevent this.)
 .PP
 You can use any of these variations when recording data.
 However, there is some ambiguous way of representing numbers like

hledger-lib/hledger_journal.info

@@ -367,7 +367,11 @@ commodity name.  Some examples:
      all groups
    * decimal part can be separated by comma or period and should be
      different from digit groups separator
-   * scientific E-notation (without digit groups) is allowed
+   * scientific E-notation is allowed.  Be careful not to use a digit
+     group separator character in scientific notation, as it's not
+     supported and it might get mistaken for a decimal point.
+     (Declaring the digit group separator character explicitly with a
+     commodity directive will prevent this.)
 
    You can use any of these variations when recording data.  However,
 there is some ambiguous way of representing numbers like '$1.000' and
@@ -1202,65 +1206,65 @@ Node: Account names11239
 Ref: #account-names11382
 Node: Amounts11869
 Ref: #amounts12005
-Node: Virtual Postings14800
-Ref: #virtual-postings14959
-Node: Balance Assertions16179
-Ref: #balance-assertions16354
-Node: Assertions and ordering17250
-Ref: #assertions-and-ordering17436
-Node: Assertions and included files18136
-Ref: #assertions-and-included-files18377
-Node: Assertions and multiple -f options18710
-Ref: #assertions-and-multiple--f-options18964
-Node: Assertions and commodities19096
-Ref: #assertions-and-commodities19331
-Node: Assertions and subaccounts20027
-Ref: #assertions-and-subaccounts20259
-Node: Assertions and virtual postings20780
-Ref: #assertions-and-virtual-postings20987
-Node: Balance Assignments21129
-Ref: #balance-assignments21298
-Node: Prices22418
-Ref: #prices22551
-Node: Transaction prices22602
-Ref: #transaction-prices22747
-Node: Market prices24903
-Ref: #market-prices25038
-Node: Comments25998
-Ref: #comments26120
-Node: Tags27362
-Ref: #tags27480
-Node: Directives28882
-Ref: #directives28995
-Node: Account aliases29188
-Ref: #account-aliases29332
-Node: Basic aliases29936
-Ref: #basic-aliases30079
-Node: Regex aliases30769
-Ref: #regex-aliases30937
-Node: Multiple aliases31655
-Ref: #multiple-aliases31827
-Node: end aliases32325
-Ref: #end-aliases32465
-Node: account directive32566
-Ref: #account-directive32746
-Node: apply account directive34093
-Ref: #apply-account-directive34289
-Node: Multi-line comments34948
-Ref: #multi-line-comments35138
-Node: commodity directive35266
-Ref: #commodity-directive35450
-Node: Default commodity36322
-Ref: #default-commodity36495
-Node: Default year37032
-Ref: #default-year37197
-Node: Including other files37620
-Ref: #including-other-files37777
-Node: Periodic transactions38174
-Ref: #periodic-transactions38340
-Node: Automated postings39329
-Ref: #automated-postings39492
-Node: EDITOR SUPPORT40394
-Ref: #editor-support40519
+Node: Virtual Postings15053
+Ref: #virtual-postings15212
+Node: Balance Assertions16432
+Ref: #balance-assertions16607
+Node: Assertions and ordering17503
+Ref: #assertions-and-ordering17689
+Node: Assertions and included files18389
+Ref: #assertions-and-included-files18630
+Node: Assertions and multiple -f options18963
+Ref: #assertions-and-multiple--f-options19217
+Node: Assertions and commodities19349
+Ref: #assertions-and-commodities19584
+Node: Assertions and subaccounts20280
+Ref: #assertions-and-subaccounts20512
+Node: Assertions and virtual postings21033
+Ref: #assertions-and-virtual-postings21240
+Node: Balance Assignments21382
+Ref: #balance-assignments21551
+Node: Prices22671
+Ref: #prices22804
+Node: Transaction prices22855
+Ref: #transaction-prices23000
+Node: Market prices25156
+Ref: #market-prices25291
+Node: Comments26251
+Ref: #comments26373
+Node: Tags27615
+Ref: #tags27733
+Node: Directives29135
+Ref: #directives29248
+Node: Account aliases29441
+Ref: #account-aliases29585
+Node: Basic aliases30189
+Ref: #basic-aliases30332
+Node: Regex aliases31022
+Ref: #regex-aliases31190
+Node: Multiple aliases31908
+Ref: #multiple-aliases32080
+Node: end aliases32578
+Ref: #end-aliases32718
+Node: account directive32819
+Ref: #account-directive32999
+Node: apply account directive34346
+Ref: #apply-account-directive34542
+Node: Multi-line comments35201
+Ref: #multi-line-comments35391
+Node: commodity directive35519
+Ref: #commodity-directive35703
+Node: Default commodity36575
+Ref: #default-commodity36748
+Node: Default year37285
+Ref: #default-year37450
+Node: Including other files37873
+Ref: #including-other-files38030
+Node: Periodic transactions38427
+Ref: #periodic-transactions38593
+Node: Automated postings39582
+Ref: #automated-postings39745
+Node: EDITOR SUPPORT40647
+Ref: #editor-support40772
 
 End Tag Table

hledger-lib/hledger_journal.m4.md

@@ -280,7 +280,9 @@ As you can see, the amount format is somewhat flexible:
 - negative amounts with a commodity on the left can have the minus sign before or after it
 - digit groups (thousands, or any other grouping) can be separated by space or comma or period and should be used as separator between all groups
 - decimal part can be separated by comma or period and should be different from digit groups separator
-- scientific E-notation (without digit groups) is allowed
+- scientific E-notation is allowed. 
+  Be careful not to use a digit group separator character in scientific notation, as it's not supported and it might get mistaken for a decimal point. 
+  (Declaring the digit group separator character explicitly with a commodity directive will prevent this.) 
 
 You can use any of these variations when recording data. However, there is some ambiguous way of representing numbers like `$1.000` and `$1,000` both may mean either one thousand or one dollar. By default hledger will assume that this is sole delimiter is used only for decimals. On the other hand commodity format declared prior to that line will help to resolve that ambiguity differently:
 

hledger-lib/hledger_journal.txt

@@ -284,7 +284,11 @@ FILE FORMAT
        o decimal  part  can be separated by comma or period and should be dif-
          ferent from digit groups separator
 
-       o scientific E-notation (without digit groups) is allowed
+       o scientific E-notation is allowed.  Be careful  not  to  use  a  digit
+         group  separator  character  in scientific notation, as it's not sup-
+         ported and it might get mistaken for a decimal point.  (Declaring the
+         digit group separator character explicitly with a commodity directive
+         will prevent this.)
 
        You can use any of these  variations  when  recording  data.   However,
        there  is  some  ambiguous  way of representing numbers like $1.000 and