Replace naked string concatenation with StringBuilder.
Replace naked string concatenation with StringBuilder.

charleso/intellij-haskforce,begray/intellij-haskforce,charleso/intellij-haskforce,KasperJanssens/intellij-haskforce,begray/intellij-haskforce,carymrobbins/intellij-haskforce,KasperJanssens/intellij-haskforce,charleso/intellij-haskforce,carymrobbins/intellij-haskforce,begray/intellij-haskforce,carymrobbins/intellij-haskforce