README rst formatting fixes

README

@@ -21,11 +21,11 @@ NEWS
 
 INSTALLATION
 ------------
-In the hledger directory, do:
+In the hledger directory, do::
 
  cabal install
 
-or:
+or::
 
  runhaskell Setup.hs configure
  runhaskell Setup.hs build
@@ -34,7 +34,7 @@ or:
 
 EXAMPLES
 --------
-Here are some commands to try:
+Here are some commands to try::
 
  hledger --help
  hledger -f sample.ledger balance
@@ -55,7 +55,7 @@ This version of hledger mimics a subset of ledger 2.6.1:
 - balance, print, register commands
 - positive and negative account & description filter patterns
 - LEDGER environment variable
-- and:
+- and::
 
    Basic options:
    -h, --help             display summarized help text
@@ -89,7 +89,7 @@ ledger features not supported:
 - flexible date syntax for --begin/--end
 - counting an unfinished timelog session
 - parsing gnucash files
-- and:
+- and::
 
    Basic options:
    -o, --output FILE      write output to FILE