diff --git a/src/zcl_excel_reader_huge_file.clas.testclasses.abap b/src/zcl_excel_reader_huge_file.clas.testclasses.abap
index 40aa290..a69a363 100644
--- a/src/zcl_excel_reader_huge_file.clas.testclasses.abap
+++ b/src/zcl_excel_reader_huge_file.clas.testclasses.abap
@@ -72,7 +72,7 @@ class lcl_test implementation.
 
     try.
         out->read_worksheet_data( io_reader = lo_reader io_worksheet = worksheet ).
-        fail(`Index to non-existent shared string should give an error`).
+        fail( `Index to non-existent shared string should give an error` ).
       catch lcx_not_found into lo_ex.
         lv_text = lo_ex->get_text( ). " >>> May inspect the message in the debugger
     endtry.
@@ -166,7 +166,7 @@ class lcl_test implementation.
 
     try.
         out->read_worksheet_data( io_reader = lo_reader io_worksheet = worksheet ).
-        fail(`Reference to non-existent style should throw an lcx_not_found exception`).
+        fail( `Reference to non-existent style should throw an lcx_not_found exception` ).
       catch lcx_not_found into lo_ex.
         lv_text = lo_ex->get_text( ).  " >>> May inspect the message in the debugger
     endtry.
@@ -236,7 +236,7 @@ class lcl_test implementation.
     lo_reader = cl_sxml_string_reader=>create( lv_xstring ).
     try.
         out->skip_to( iv_element_name = `nonExistingElement` io_reader = lo_reader ).
-        fail(`Skipping to non-existing element must raise lcx_not_found exception`).
+        fail( `Skipping to non-existing element must raise lcx_not_found exception` ).
       catch lcx_not_found into lo_ex.
         lv_text = lo_ex->get_text( ). " May inspect exception text in debugger
     endtry.
diff --git a/src/zcl_excel_writer_2007.clas.abap b/src/zcl_excel_writer_2007.clas.abap
index bf00059..22c2ae3 100644
--- a/src/zcl_excel_writer_2007.clas.abap
+++ b/src/zcl_excel_writer_2007.clas.abap
@@ -4918,7 +4918,7 @@ METHOD create_xl_sheet_sheet_data.
           " Row visibility of previos row.
           IF lo_row->get_visible( io_worksheet ) = abap_false OR
              l_autofilter_hidden = abap_true.
-            lo_element_2->set_attribute_ns( name  = 'hidden' value = 'true').
+            lo_element_2->set_attribute_ns( name  = 'hidden' value = 'true' ).
           ENDIF.
 *          lv_xstring_partial = render_ixml_element_no_header( lo_element_2 ).
 *          CONCATENATE lv_xstring lv_xstring_partial
@@ -4951,13 +4951,13 @@ METHOD create_xl_sheet_sheet_data.
            l_autofilter_hidden = abap_true.
           " Row dimensions
           IF lo_row->get_row_height( ) >= 0.
-            lo_element_2->set_attribute_ns( name  = 'customHeight' value = '1').
+            lo_element_2->set_attribute_ns( name  = 'customHeight' value = '1' ).
             lv_value = lo_row->get_row_height( ).
             lo_element_2->set_attribute_ns( name  = 'ht' value = lv_value ).
           ENDIF.
           " Collapsed
           IF lo_row->get_collapsed( io_worksheet ) = abap_true.
-            lo_element_2->set_attribute_ns( name  = 'collapsed' value = 'true').
+            lo_element_2->set_attribute_ns( name  = 'collapsed' value = 'true' ).
           ENDIF.
           " Outline level
           IF lo_row->get_outline_level( io_worksheet ) > 0.
@@ -4970,7 +4970,7 @@ METHOD create_xl_sheet_sheet_data.
           IF lo_row->get_xf_index( ) <> 0.
             lv_value = lo_row->get_xf_index( ).
             lo_element_2->set_attribute_ns( name  = 's' value = lv_value ).
-            lo_element_2->set_attribute_ns( name  = 'customFormat'  value = '1').
+            lo_element_2->set_attribute_ns( name  = 'customFormat'  value = '1' ).
           ENDIF.
         ENDIF.
         IF lt_values IS INITIAL. " no values attached to autofilter  " issue #368 autofilter filtering too much
@@ -5096,7 +5096,7 @@ METHOD create_xl_sheet_sheet_data.
     " Row visibility of previos row.
     IF lo_row->get_visible( ) = abap_false OR
        l_autofilter_hidden = abap_true.
-      lo_element_2->set_attribute_ns( name  = 'hidden' value = 'true').
+      lo_element_2->set_attribute_ns( name  = 'hidden' value = 'true' ).
     ENDIF.
 *    lv_xstring_partial = render_ixml_element_no_header( lo_element_2 ).
 *    CONCATENATE lv_xstring lv_xstring_partial
diff --git a/src/zdemo_excel22.prog.abap b/src/zdemo_excel22.prog.abap
index 1817cef..0ae4b2b 100644
--- a/src/zdemo_excel22.prog.abap
+++ b/src/zdemo_excel22.prog.abap
@@ -36,7 +36,7 @@ START-OF-SELECTION.
 
   " Get active sheet
   lo_worksheet = lo_excel->get_active_worksheet( ).
-  lo_worksheet->set_title( ip_title = 'PN_MASSIVE').
+  lo_worksheet->set_title( ip_title = 'PN_MASSIVE' ).
 
   DATA lt_test TYPE TABLE OF sflight.
   SELECT * FROM sflight INTO TABLE lt_test. "#EC CI_NOWHERE
diff --git a/src/zdemo_excel3.prog.abap b/src/zdemo_excel3.prog.abap
index cfc4805..3ea4271 100644
--- a/src/zdemo_excel3.prog.abap
+++ b/src/zdemo_excel3.prog.abap
@@ -38,7 +38,7 @@ START-OF-SELECTION.
 
   " Get active sheet
   lo_worksheet = lo_excel->get_active_worksheet( ).
-  lo_worksheet->set_title( ip_title = 'Internal table').
+  lo_worksheet->set_title( ip_title = 'Internal table' ).
 
   DATA lt_test TYPE TABLE OF sflight.
 
diff --git a/src/zdemo_excel33.prog.abap b/src/zdemo_excel33.prog.abap
index e27af3c..c539944 100644
--- a/src/zdemo_excel33.prog.abap
+++ b/src/zdemo_excel33.prog.abap
@@ -33,7 +33,7 @@ START-OF-SELECTION.
 
   " Get active sheet
   lo_worksheet = lo_excel->get_active_worksheet( ).
-  lo_worksheet->set_title( ip_title = 'Internal table').
+  lo_worksheet->set_title( ip_title = 'Internal table' ).
 
   SELECT * UP TO 2 ROWS FROM t005t INTO TABLE lt_test.  "#EC CI_NOWHERE