Backport of#28396.

Theanalyzeline function currently passes over all/ characters, presumably assuming they only indicate the name of the common block. However, this means division operations after the common block name are also passed over.
For instance
common /mortmp/ ctmp((lub*(lub+1)*(lub+1))/lpmin+1)
fails to parse correctly.

This pull request attempts to rectify this by counting the number of slashes encountered in the line and only passing over the first two.

• BUG: Fix crackpython parsing error when a division occurs within a common block

• Add test for more complicated array sizing expression

• fix typos

• Simplify tests to currently supported syntax

• Use regular expression to find common block name

• Revert from broken regular expression version to prior version, add comment

• Add space before inline comment

• Use regular expression to split line

• Add missing white space to appease linter

• More linting fixes

• Pass maxsplit as a keyword argument