Make flake8 enforce PEP8 max line length of 80

close #434

.travis.yml

@@ -18,7 +18,7 @@ install:
   - pip install -r requirements-travis.txt
 
 before_script:
-  - flake8 ./exercises/ --max-line-length=99 --select=E,W
+  - flake8
 
 script:
   - ./test/check-exercises.py

README.md

@@ -34,13 +34,9 @@ python test/check-exercises.py
 
 ## Code Style
 
-The Python code in this repo is meant to largely obey the [PEP8 style guide](https://www.python.org/dev/peps/pep-0008/).
+The Python code in this repo is meant to follow the [PEP8 style guide](https://www.python.org/dev/peps/pep-0008/).
 
-This repo uses [flake8](http://flake8.readthedocs.org/en/latest/) to enforce the coding standard. When you submit a PR, it needs to pass the flake8 tool with no warnings, or it won't be accepted. Here are the settings used by the build system:
-
-```
-flake8 [your-code-here.py] --max-line-length=99 --select=E,W
-```
+This repo uses [flake8](http://flake8.readthedocs.org/en/latest/) with default settings to enforce the coding standard. When you submit a PR, it needs to pass the flake8 tool with no warnings, or it won't be accepted.
 
 ## Pull Requests
 

exercises/word-search/example.py

@@ -19,7 +19,7 @@ class Point(object):
         return self.x == other.x and self.y == other.y
 
     def __ne__(self, other):
-        return not(self == other)
+        return not (self == other)
 
 
 DIRECTIONS = (Point(1, 0), Point(1, -1), Point(1, 1), Point(-1, -1),
@@ -40,15 +40,16 @@ class WordSearch(object):
         return self.rows[coordinate.y][coordinate.x]
 
     def find(self, word, position, direction):
-            current = copy.copy(position)
-            for letter in word:
-                if self.find_char(current) != letter:
-                    return
-                current += direction
-            return position, current - direction
+        current = copy.copy(position)
+        for letter in word:
+            if self.find_char(current) != letter:
+                return
+            current += direction
+        return position, current - direction
 
     def search(self, word):
-        positions = (Point(x, y) for x in range(self.width) for y in range(self.height))
+        positions = (Point(x, y)
+                     for x in range(self.width) for y in range(self.height))
         for pos in positions:
             for d in DIRECTIONS:
                 result = self.find(word, pos, d)