Fix line lengths

Author: phansch

src/macro-expansion.md

@@ -96,9 +96,9 @@ three cases has occurred:
   from metavariables to the corresponding token trees.
 - Failure: `tts` does not match `ms`. This results in an error message such as
   "No rule expected token _blah_".
-- Error: some fatal error has occurred _in the parser_. For example, this happens
-  if there are more than one pattern match, since that indicates the macro is
-  ambiguous.
+- Error: some fatal error has occurred _in the parser_. For example, this
+  happens if there are more than one pattern match, since that indicates
+  the macro is ambiguous.
 
 The full interface is defined [here][code_parse_int].
 

src/tests/running.md

@@ -76,9 +76,9 @@ enable it in the `config.toml`, too:
 incremental = true
 ```
 
-Note that incremental compilation will use more disk space than
-usual. If disk space is a concern for you, you might want to check the
-size of the `build` directory from time to time.
+Note that incremental compilation will use more disk space than usual.
+If disk space is a concern for you, you might want to check the size
+of the `build` directory from time to time.
 
 ## Running tests manually