assert: limit string inspection when logging assertion errors

This makes sure long strings as `actual` or `expected` values on an
`AssertionError` won't be logged completely. This is important as
the actual value is somewhat redundant in combination with the error
message which already logs the difference between the input values.
PR-URL: #28058
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: BridgeAR

lib/internal/assert/assertion_error.js

@@ -429,11 +429,37 @@ class AssertionError extends Error {
 }
 
 [inspect.custom](recurseTimes,ctx){
+// Long strings should not be fully inspected.
+consttmpActual=this.actual;
+consttmpExpected=this.expected;
+
+for(constnameof['actual','expected']){
+if(typeofthis[name]==='string'){
+constlines=this[name].split('\n');
+if(lines.length>10){
+lines.length=10;
+this[name]=`${lines.join('\n')}\n...`;
+}elseif(this[name].length>512){
+this[name]=`${this[name].slice(512)}...`;
+}
+}
+}
+
 // This limits the `actual` and `expected` property default inspection to
 // the minimum depth. Otherwise those values would be too verbose compared
 // to the actual error message which contains a combined view of these two
 // input values.
-returninspect(this,{ ...ctx,customInspect: false,depth: 0});
+constresult=inspect(this,{
+ ...ctx,
+customInspect: false,
+depth: 0
+});
+
+// Reset the properties after inspection.
+this.actual=tmpActual;
+this.expected=tmpExpected;
+
+returnresult;
 }
 }