Update ISSUES.md

spelling correction

Author: TimidRobot

ISSUES.md

@@ -2,7 +2,7 @@
 
 ## Detection of catching some exceptions
 
-Docstring for this method will conain 'Raises Exception':
+Docstring for this method will contain 'Raises Exception':
 
 ~~~{python}
 def foo():
@@ -28,4 +28,4 @@ Comment
   return x
 ~~~
 
-This will probably result in an error, though the code is valid.
+This will probably result in an error, though the code is valid.