Incomplete error message when sketch uses too much memory

[federicobond]

Bug Report

Current behavior

When compiling a sketch that uses too much memory, the compile command output ends with something like this:

Sketch uses 22312 bytes (69%) of program storage space. Maximum is 32256 bytes.
Global variables use 3263 bytes (159%) of dynamic memory, leaving -1215 bytes for local variables. Maximum is 2048 bytes.
Not enough memory; see http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing your footprint.
Error during build: build failed: 

Expected behavior

Last line should not end with colon (:)

Environment

• CLI version (output of arduino-cli version): arduino-cli Version: 0.6.0 Commit: 3a08b07
• OS and platform: macOS 10.15.2