slightly refactor your code. I hope some of the examples above show you that there are
many ways in which you can do it.
+(labels/line-length)=
+
### Line length
You probably noticed the peculiar default line length. _Black_ defaults to 88 characters
_Black_ will allow single empty lines inside functions, and single and double empty
lines on module level left by the original editors, except when they're within
parenthesized expressions. Since such expressions are always reformatted to fit minimal
-space, this whitespace is lost.
+space, this whitespace is lost. The other exception is that it will remove any empty
+lines immediately following a statement that introduces a new indentation level.
+
+```python
+# in:
+
+def foo():
+
+ print("All the newlines above me should be deleted!")
+
+
+if condition:
+
+ print("No newline above me!")
+
+ print("There is a newline above me, and that's OK!")
+
+
+class Point:
+
+ x: int
+ y: int
+
+# out:
+
+def foo():
+ print("All the newlines above me should be deleted!")
+
+
+if condition:
+ print("No newline above me!")
+
+ print("There is a newline above me, and that's OK!")
+
+
+class Point:
+ x: int
+ y: int
+```
It will also insert proper spacing before and after function definitions. It's one line
before and after inner functions and two lines before and after module-level functions
bracket pair into one item per line. Read more about this in the
[Pragmatism](#pragmatism) section below.
+(labels/strings)=
+
### Strings
_Black_ prefers double quotes (`"` and `"""`) over single quotes (`'` and `'''`). It
_Black_ does make some exceptions to rules it otherwise holds. This section documents
what those exceptions are and why this is the case.
+(labels/magic-trailing-comma)=
+
### The magic trailing comma
_Black_ in general does not take existing formatting into account.
r-strings and R-strings. The former are syntax highlighted as regular expressions while
the latter are treated as true raw strings with no special semantics.
+(labels/ast-changes)=
+
### AST before and after formatting
When run with `--safe` (the default), _Black_ checks that the code before and after is
1. _Black_ cleans up leading and trailing whitespace of docstrings, re-indenting them if
needed. It's been one of the most popular user-reported features for the formatter to
fix whitespace issues with docstrings. While the result is technically an AST
- difference, due to the various possibilities of forming docstrings, all realtime use
- of docstrings that we're aware of sanitizes indentation and leading/trailing
+ difference, due to the various possibilities of forming docstrings, all real-world
+ uses of docstrings that we're aware of sanitize indentation and leading/trailing
whitespace anyway.
1. _Black_ manages optional parentheses for some statements. In the case of the `del`