Fixed syntax errors specific to PHP5.5- to still support PHP5.4+

Author: vladar

src/Type/Definition/FloatType.php

@@ -9,9 +9,9 @@ class FloatType extends ScalarType
     public $name = Type::FLOAT;
 
     public $description =
-        'The `Float` scalar type represents signed double-precision fractional ' .
-        'values as specified by ' .
-        '[IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). ';
+'The `Float` scalar type represents signed double-precision fractional
+values as specified by
+[IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). ';
 
     public function serialize($value)
     {

src/Type/Definition/IDType.php

@@ -9,11 +9,11 @@ class IDType extends ScalarType
     public $name = 'ID';
 
     public $description =
-        'The `ID` scalar type represents a unique identifier, often used to ' .
-        'refetch an object or as key for a cache. The ID type appears in a JSON ' .
-        'response as a String; however, it is not intended to be human-readable. ' .
-        'When expected as an input type, any string (such as `"4"`) or integer ' .
-        '(such as `4`) input value will be accepted as an ID.';
+'The `ID` scalar type represents a unique identifier, often used to
+refetch an object or as key for a cache. The ID type appears in a JSON
+response as a String; however, it is not intended to be human-readable.
+When expected as an input type, any string (such as `"4"`) or integer
+(such as `4`) input value will be accepted as an ID.';
 
     public function serialize($value)
     {

src/Type/Definition/IntType.php

@@ -17,8 +17,8 @@ class IntType extends ScalarType
     public $name = Type::INT;
 
     public $description =
-        'The `Int` scalar type represents non-fractional signed whole numeric ' .
-        'values. Int can represent values between -(2^31) and 2^31 - 1. ';
+'The `Int` scalar type represents non-fractional signed whole numeric
+values. Int can represent values between -(2^31) and 2^31 - 1. ';
 
     public function serialize($value)
     {

src/Type/Definition/StringType.php

@@ -8,9 +8,9 @@ class StringType extends ScalarType
     public $name = Type::STRING;
 
     public $description =
-        'The `String` scalar type represents textual data, represented as UTF-8 ' .
-        'character sequences. The String type is most often used by GraphQL to ' .
-        'represent free-form human-readable text.';
+'The `String` scalar type represents textual data, represented as UTF-8
+character sequences. The String type is most often used by GraphQL to
+represent free-form human-readable text.';
 
     public function serialize($value)
     {