PrettyPrinter: Extra space while printing lambda expressions

[rishivijayv]

The issue and a possible reproduction is described in more detail in this comment: #6237 (comment)

#6237 is supposed to have fixed some issue with SniperPrinter adding space before type-casts. However, @algomaster99 highlighted the above issue with space being added while printing lambda expressions.

[rishivijayv]

It seems unlikely that the fix for SniperPrinter in #6237 fixes the issue with lambda expressions as well (since that was directed towards type-casts -- #6237 (comment)). Though a check to see if the issue is fixed before proceeding with a fix would be prudent.