Fix PHP 7.4 deprecation warning, also: exception string formatting

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/less.php/Less.php b/lib/less.php/Less.php
index a68b749..89a4877 100644
--- a/lib/less.php/Less.php
+++ b/lib/less.php/Less.php
@@ -5378,7 +5378,7 @@ class Less_Tree_Dimension extends Less_Tree{
 				$other = $other->convertTo( $this->unit->usedUnits());
 
 				if( Less_Parser::$options['strictUnits'] && $other->unit->toString() !== $unit->toCSS() ){
-					throw new Less_Exception_Compiler("Incompatible units. Change the units or use the unit function. Bad units: '".$unit->toString() . "' and ".$other->unit->toString()+"'.");
+					throw new Less_Exception_Compiler("Incompatible units. Change the units or use the unit function. Bad units: '".$unit->toString()."' and '".$other->unit->toString()."'.");
 				}
 
 				$value = Less_Functions::operate( $op, $this->value, $other->value);
@@ -10524,4 +10524,4 @@ class Less_SourceMap_Generator extends Less_Configurable {
 		return $path;

 	}

 

-}
\ No newline at end of file
+}