Mention delimiter_split() in CannotSplit docstring

[etc/vim.git] / black.py

diff --git a/black.py b/black.py
index 81efa59a50669070b4005e4f4c5a73916ab3c43a..950eac79e8c8f41c6d672183cfbf717ff10fccdc 100644 (file)
--- a/black.py
+++ b/black.py
@@ -22,7 +22,7 @@ from blib2to3 import pygram, pytree
 from blib2to3.pgen2 import driver, token
 from blib2to3.pgen2.parse import ParseError
 
-__version__ = "18.3a2"
+__version__ = "18.3a3"
 DEFAULT_LINE_LENGTH = 88
 # types
 syms = pygram.python_symbols
@@ -44,7 +44,7 @@ class NothingChanged(UserWarning):
 class CannotSplit(Exception):
     """A readable split that fits the allotted line length is impossible.
 
-    Raised by `left_hand_split()` and `right_hand_split()`.
+    Raised by `left_hand_split()`, `right_hand_split()`, and `delimiter_split()`.
     """
 
 
@@ -340,6 +340,7 @@ MATH_OPERATORS = {
     token.AMPER,
     token.PERCENT,
     token.CIRCUMFLEX,
+    token.TILDE,
     token.LEFTSHIFT,
     token.RIGHTSHIFT,
     token.DOUBLESTAR,
@@ -509,10 +510,16 @@ class Line:
         ):
             return False
 
-        if closing.type == token.RSQB or closing.type == token.RBRACE:
+        if closing.type == token.RBRACE:
             self.leaves.pop()
             return True
 
+        if closing.type == token.RSQB:
+            comma = self.leaves[-1]
+            if comma.parent and comma.parent.type == syms.listmaker:
+                self.leaves.pop()
+                return True
+
         # For parens let's check if it's safe to remove the comma.  If the
         # trailing one is the only one, we might mistakenly change a tuple
         # into a different type by removing the comma.
@@ -866,21 +873,22 @@ def whitespace(leaf: Leaf) -> str:  # noqa C901
 
         if prevp.type == token.EQUAL:
             if prevp.parent and prevp.parent.type in {
-                syms.typedargslist,
-                syms.varargslist,
-                syms.parameters,
                 syms.arglist,
                 syms.argument,
+                syms.parameters,
+                syms.typedargslist,
+                syms.varargslist,
             }:
                 return NO
 
         elif prevp.type == token.DOUBLESTAR:
             if prevp.parent and prevp.parent.type in {
-                syms.typedargslist,
-                syms.varargslist,
-                syms.parameters,
                 syms.arglist,
+                syms.argument,
                 syms.dictsetmaker,
+                syms.parameters,
+                syms.typedargslist,
+                syms.varargslist,
             }:
                 return NO
 
@@ -888,7 +896,11 @@ def whitespace(leaf: Leaf) -> str:  # noqa C901
             if prevp.parent and prevp.parent.type in {syms.subscript, syms.sliceop}:
                 return NO
 
-        elif prevp.parent and prevp.parent.type in {syms.factor, syms.star_expr}:
+        elif (
+            prevp.parent
+            and prevp.parent.type in {syms.factor, syms.star_expr}
+            and prevp.type in MATH_OPERATORS
+        ):
             return NO
 
     elif prev.type in OPENING_BRACKETS: