$a =+ 3 ;
EXPECT
Reversed += operator at - line 3.
+Name "main::a" used only once: possible typo at - line 3.
########
#! perl -w
# warnable code, warnings enabled via #! line
$a =+ 3 ;
EXPECT
Reversed += operator at - line 3.
+Name "main::a" used only once: possible typo at - line 3.
########
# warnable code, warnings enabled via compile time $^W
$a =+ 3 ;
EXPECT
Reversed += operator at - line 4.
+Name "main::a" used only once: possible typo at - line 4.
########
# compile-time warnable code, warnings enabled via runtime $^W