cmat ← ##.mtrim cmat                        ⍝ Trim off trailing blank cols.

Trims trailing blank columns from a character matrix.

Example:

      txt←4 10⍴'It        little    profits   that      '

      display txt
┌→─────────┐ 
↓It        │
│little    │
│profits   │
│that      │
└──────────┘

      display mtrim txt
┌→──────┐ 
↓It     │
│little │
│profits│
│that   │
└───────┘

See also: vtrim dtb

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