Fix typo (#875)

docs/src/index.md

@@ -188,7 +188,7 @@ end
 ### `force_long_function_def`
 > default: `false`
 
-If `true` tweaks the behavior of `short_to_long_function_def` to force the transformation no matter 
+If `true` tweaks the behavior of `short_to_long_function_def` to force the transformation no matter
 how short the function definition is.
 
 ### `long_to_short_function_def`
@@ -620,11 +620,11 @@ a = f(aaa, bbb, ccc)
 # ok
 ```
 
-If you wish to not format an entire file just add `#!: format: off` to the top of the file.
+If you wish to not format an entire file just add `#! format: off` to the top of the file.
 
 ### Stopping a block of code from indenting
 
-Sometimes you may wish for a block of code to not be indented. You can achieve this with `#!: format: noindent`.
+Sometimes you may wish for a block of code to not be indented. You can achieve this with `#! format: noindent`.
 
 ```julia
 begin
@@ -663,7 +663,7 @@ end
 
 Notice the contents of `@muladd begin` is not indented.
 
-`#!: format: noindent` can also be nested.
+`#! format: noindent` can also be nested.
 
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