fix some other syntax warnings

IPython/core/completerlib.py

@@ -185,7 +185,7 b' def try_import(mod: str, only_modules=False) -> List[str]:'
 #-----------------------------------------------------------------------------
 
 def quick_completer(cmd, completions):
-    """ Easily create a trivial completer for a command.
+    r""" Easily create a trivial completer for a command.
 
     Takes either a list of completions, or all completions in string (that will
     be split on whitespace).

IPython/core/display.py

@@ -710,7 +710,7 b' class Markdown(TextDisplayObject):'
 class Math(TextDisplayObject):
 
     def _repr_latex_(self):
-        s = "$\displaystyle %s$" % self.data.strip('$')
+        s = r"$\displaystyle %s$" % self.data.strip('$')
         if self.metadata:
             return s, deepcopy(self.metadata)
         else:

IPython/core/inputtransformer2.py

@@ -78,7 +78,7 b" ipython_prompt = PromptStripper(re.compile(r'^(In \\[\\d+\\]: |\\s*\\.{3,}: ?)'))"
 def cell_magic(lines):
     if not lines or not lines[0].startswith('%%'):
         return lines
-    if re.match('%%\w+\?', lines[0]):
+    if re.match(r'%%\w+\?', lines[0]):
         # This case will be handled by help_end
         return lines
     magic_name, _, first_line = lines[0][2:-1].partition(' ')
@@ -116,7 +116,7 b' def find_end_of_continued_line(lines, start_line: int):'
     return end_line
 
 def assemble_continued_line(lines, start: Tuple[int, int], end_line: int):
-    """Assemble a single line from multiple continued line pieces
+    r"""Assemble a single line from multiple continued line pieces
 
     Continued lines are lines ending in ``\``, and the line following the last
     ``\`` in the block.

IPython/core/magics/namespace.py

@@ -49,7 +49,7 b' class NamespaceMagics(Magics):'
         # We need to detect if we got called as 'pinfo pinfo foo', which can
         # happen if the user types 'pinfo foo?' at the cmd line.
         pinfo,qmark1,oname,qmark2 = \
-               re.match('(pinfo )?(\?*)(.*?)(\??$)',parameter_s).groups()
+               re.match(r'(pinfo )?(\?*)(.*?)(\??$)',parameter_s).groups()
         if pinfo or qmark1 or qmark2:
             detail_level = 1
         if "*" in oname:

IPython/lib/demo.py

@@ -197,7 +197,7 b' def re_mark(mark):'
 
 class Demo(object):
 
-    re_stop     = re_mark('-*\s?stop\s?-*')
+    re_stop     = re_mark(r'-*\s?stop\s?-*')
     re_silent   = re_mark('silent')
     re_auto     = re_mark('auto')
     re_auto_all = re_mark('auto_all')

IPython/lib/latextools.py

@@ -179,7 +179,7 b' def genelatex(body, wrap):'
         yield u'$${0}$$'.format(body)
     else:
         yield body
-    yield u'\end{document}'
+    yield u'\\end{document}'
 
 
 _data_uri_template_png = u"""<img src="data:image/png;base64,%s" alt=%s />"""

IPython/lib/lexers.py

@@ -494,7 +494,7 b' class IPythonConsoleLexer(Lexer):'
             yield token
 
 class IPyLexer(Lexer):
-    """
+    r"""
     Primary lexer for all IPython-like code.
 
     This is a simple helper lexer.  If the first line of the text begins with

IPython/testing/ipunittest.py

@@ -63,8 +63,8 b' class IPython2PythonConverter(object):'
         self.rout = re.compile(r'Out\[\d+\]: \s*?\n?')
         self.pyps1 = '>>> '
         self.pyps2 = '... '
-        self.rpyps1 = re.compile ('(\s*%s)(.*)$' % self.pyps1)
-        self.rpyps2 = re.compile ('(\s*%s)(.*)$' % self.pyps2)
+        self.rpyps1 = re.compile (r'(\s*%s)(.*)$' % self.pyps1)
+        self.rpyps2 = re.compile (r'(\s*%s)(.*)$' % self.pyps2)
 
     def __call__(self, ds):
         """Convert IPython prompts to python ones in a string."""