fixed formatting on contributing page

CONTRIBUTING.md

@@ -7,13 +7,13 @@ Thank you for your interest in contributing to Olive! In order to keep the code
 When contributing to Olive, it's recommended to use the following rules:
 
 * The code style generally follows the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html) including, but not limited to:
-** Indentation is 2 spaces wide, spaces only (no tabs)
-** `lowercase_underscored_variable_names`
-** `lowercase_underscored_functions()` or `SentenceCaseFunctions()`
-** `class SentenceCaseClassesAndStructs {}`
-** `kSentenceCaseConstants` prepended with a lowercase `k`
-** `UPPERCASE_UNDERSCORED_MACROS` for variables or same style as functions for macro functions
-** `class_member_variables_` end with a `_`
+  * Indentation is 2 spaces wide, spaces only (no tabs)
+  * `lowercase_underscored_variable_names`
+  * `lowercase_underscored_functions()` or `SentenceCaseFunctions()`
+  * `class SentenceCaseClassesAndStructs {}`
+  * `kSentenceCaseConstants` prepended with a lowercase `k`
+  * `UPPERCASE_UNDERSCORED_MACROS` for variables or same style as functions for macro functions
+  * `class_member_variables_` end with a `_`
 * 100 column limit (where it doesn't impair readability)
 * Unix line endings (only LF no CRLF)
 * Javadoc documentation where appropriate