Adjust help message

Author: smoelius

README.md

@@ -33,8 +33,8 @@ is converted to options of the form:
 where `M` is `N` minus the sum of the widths of the indentation,
 the `//!` or `///` syntax, and the space that might follow that
 syntax. If a rustfmt.toml file with a `max_width` key is found
-in the current directory or a parent directory, the
-`--max-width` option is applied automatically.
+in a current or parent directory, the `--max-width` option is
+applied automatically.
 
 rustdoc-prettier supports glob patterns. Example:
 

src/main.rs

@@ -181,8 +181,8 @@ is converted to options of the form:
 where `M` is `N` minus the sum of the widths of the indentation,
 the `//!` or `///` syntax, and the space that might follow that
 syntax. If a rustfmt.toml file with a `max_width` key is found
-in the current directory or a parent directory, the
-`--max-width` option is applied automatically.
+in a current or parent directory, the `--max-width` option is
+applied automatically.
 
 rustdoc-prettier supports glob patterns. Example: