SI-9847 Nuance pure expr statement warning

Clarify the current warning, which means that an expression
split over multiple lines may not be parsed as naively expected.

When typing a block, attempt minor nuance. For instance, a
single expression is not in need of parens. Try to avoid
duplicate warnings for expressions that were adapted away
from result position.

1 files changed, 3 insertions, 3 deletions

diff --git a/test/files/neg/unit-returns-value.check b/test/files/neg/unit-returns-value.check
index f30a506ebe..7ebfbfde29 100644
--- a/test/files/neg/unit-returns-value.check
+++ b/test/files/neg/unit-returns-value.check
@@ -1,13 +1,13 @@
-unit-returns-value.scala:4: warning: a pure expression does nothing in statement position; you may be omitting necessary parentheses
+unit-returns-value.scala:4: warning: a pure expression does nothing in statement position
     if (b) return 5
                   ^
 unit-returns-value.scala:4: warning: enclosing method f has result type Unit: return value discarded
     if (b) return 5
            ^
-unit-returns-value.scala:22: warning: a pure expression does nothing in statement position; you may be omitting necessary parentheses
+unit-returns-value.scala:22: warning: a pure expression does nothing in statement position; multiline expressions might require enclosing parentheses
     i1 // warn
     ^
-unit-returns-value.scala:23: warning: a pure expression does nothing in statement position; you may be omitting necessary parentheses
+unit-returns-value.scala:23: warning: a pure expression does nothing in statement position; multiline expressions might require enclosing parentheses
     i2 // warn
     ^
 error: No warnings can be incurred under -Xfatal-warnings.