update doc

README.md

@@ -7,7 +7,7 @@ commands
 - `eng-plate`: central deflection and min. thickness of a circular plate
 - `eng-tube`: bubkling stress of a tube
 
-libs
+lib functions
 - `engineering.area.area(vertices)`
 - `engineering.awg.diameter(number)`
 - `engineering.awg.area(number)`

src/engineering/area.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """\
-Determine the area of a simple polygon
+Determine the area of a simple polygon.
 """
-from builtins import input
+import builtins
 import sys
 import re
 
@@ -78,7 +78,7 @@ def main():
     choice = 'q'
   try:
     while choice not in ('q', 'quit', 'exit'):
-      choice = input(" %i Points, area: " % len(points) +
+      choice = builtins.input(" %i Points, area: " % len(points) +
                      info("%.2f ") % a + "> " + csi(Style.NOBOLD, FGColor.COMMAND))
       sys.stdout.write(reset())
       choice = " ".join(choice.split())  # replace multiple spaces with single one