strings: Java Strings deep dive companion code (pool/intern, indy concat vs StringBuilder JMH, text blocks, string templates)

Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01KqJyCidz3ZgRyHABv2GVJh
2026-09-30 19:06:34 +00:00
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+--- closing delimiter on its own line, aligned with the text ---
+{\n
+.."id":.1\n
+}\n
+
+--- closing delimiter right after the last line (no final newline) ---
+{\n
+.."id":.1\n
+}
+--- closing delimiter 2 columns left of the text: 2 spaces of indentation survive ---
+..left\n
+
+--- trailing spaces are stripped, but \s and \040 survive ---
+x....\n
+y.\n
+
+--- backslash at end of line joins the lines ---
+one.line\n
+
+--- escapes are processed after indentation is stripped ---
+tab:	|\n
+
+--- double quotes need no escape; only a run of three does ---
+say."hi".and."""\n
+
+two identical text blocks are the same pooled instance: true
+equals the hand-written literal: true
+--- formatted() is the built-in way to interpolate ---
+Hello,.Ann!.You.are.30.\n
+