Syntax highlighting fails at inline forall statements

[ChrisspyB]

Hi all - nice extension, thanks for your work in maintaining this repo.

The syntax highlighting appears to be incorrect for forall statements that consist of only one line. Please see the following example:

In line 4, arr(i) = i * i has been highlighted in red, even though this is valid syntax and the file compiles (gfortran). The error propagates to other parts of the program too: notice that the end statement is also no longer highlighted here. For comparison, compare with the highlighting when the forall removed.

In more complex files, this error propagation becomes quite severe, causing a large number of syntax-highlighting issues, rendering some files almost unreadable.

Many thanks.

[pedro-ricardo]

Thank you for the report and Fix :+1
This will be released in #167.