wrong formatting

This
```
r8 returns[int operandSize,int col]:
```

will become
```
r8 returns [ i n t o p e r a n d S i z e , i n t c o l ]
```

Many spaces inserted between characters, which is wrong.
thanks

Reproduce the formatter behavior using the ANTLR grammar snippet in the issue and compare the current output with the expected spacing shown there. Trace the formatting path responsible for splitting characters, then verify that the snippet retains its intended spaces and type syntax.

Written by the indexing model from the issue text.