[morph.ai] Fixed PLAYGROUND-PR-3367 -- Improved detection of keywords following numbers in Python syntax highlighting

[MorphCodeBot]

This PR fixes an issue where Python keywords directly following numbers were not being properly detected and highlighted.

Problem:

• In code like 1if, the if keyword was not highlighted because the number token wasn't properly terminated
• This affected any keyword that followed a number without spaces

Solution:

• Updated the NUMBER token definition in the Python grammar to enforce word boundaries
• This ensures proper separation between numeric literals and subsequent keywords
• Keywords following numbers are now correctly detected and highlighted

Example:

print(1if 0==0else"b")

Now properly highlights both if and else keywords even when they directly follow numbers.

Testing:

• Verified that keywords following numbers are properly highlighted
• Confirmed numeric literal highlighting still works correctly
• Checked that existing Python syntax highlighting remains unaffected

Additional ticket processing details