Add doc about the reason of 'tabStop = 1' in LKQL analysis context creation

Author: HugoGGuerrier

lkql_jit/language/src/main/java/com/adacore/lkql_jit/LKQLLanguage.java

@@ -103,6 +103,9 @@ public final class LKQLLanguage extends TruffleLanguage<LKQLContext> {
     /** A simple constructor for the library loading. */
     public LKQLLanguage() {
         super();
+        // We create an LKQL analysis context with a tab-stop size of 1 since Truffle.Source
+        // columns counting is based on characters:
+        // https://www.graalvm.org/truffle/javadoc/com/oracle/truffle/api/source/Source.html#createSection(int,int,int,int)
         this.lkqlAnalysisContext = Liblkqllang.AnalysisContext.create(
             null,
             null,
@@ -111,6 +114,7 @@ public LKQLLanguage() {
             true,
             1
         );
+
         // Set the color support flag
         SUPPORT_COLOR = System.getenv("TERM") != null && System.console() != null;
     }