Help/command/if: fix formatting in precedence order overview

Due to extra space symbols, it was rendered as definition list inside
list item, instead of plain list item.

Help/command/if.rst

@@ -42,8 +42,8 @@ Compound conditions are evaluated in the following order of precedence:
 1. `Parentheses`_.
 
 2. Unary tests such as `COMMAND`_, `POLICY`_, `TARGET`_, `TEST`_,
-    `EXISTS`_, `IS_READABLE`_, `IS_WRITABLE`_, `IS_EXECUTABLE`_,
-    `IS_DIRECTORY`_, `IS_SYMLINK`_, `IS_ABSOLUTE`_, and `DEFINED`_.
+   `EXISTS`_, `IS_READABLE`_, `IS_WRITABLE`_, `IS_EXECUTABLE`_,
+   `IS_DIRECTORY`_, `IS_SYMLINK`_, `IS_ABSOLUTE`_, and `DEFINED`_.
 
 3. Binary tests such as `EQUAL`_, `LESS`_, `LESS_EQUAL`_, `GREATER`_,
    `GREATER_EQUAL`_, `STREQUAL`_, `STRLESS`_, `STRLESS_EQUAL`_,