Remove Guile line numbers from backtrace tests

As these differ between 3.0.10 and 3.0.11.

tests/backtraces/call-with-cached-connection.scm

@@ -4,7 +4,7 @@
  (lambda ()
    (let ((cache (make-fixed-size-resource-pool
                  (list (open-input-string "fake")))))
-     ;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+     ;; FIRST BACKTRACE ENTRY: (with-exception-handler
      (with-exception-handler
          (lambda (e)
            (print-backtrace-and-exception/knots e)

tests/backtraces/call-with-resource-from-pool.scm

@@ -3,7 +3,7 @@
 (run-fibers
  (lambda ()
    (let ((pool (make-resource-pool (const 'resource) 1)))
-     ;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+     ;; FIRST BACKTRACE ENTRY: (with-exception-handler
      (with-exception-handler
          (lambda (e)
            (print-backtrace-and-exception/knots e)

tests/backtraces/call-with-thread.scm

@@ -2,7 +2,7 @@
 
 (define thread-pool (make-fixed-size-thread-pool 1))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/fibers-force.scm

@@ -2,7 +2,7 @@
 
 (run-fibers
  (lambda ()
-   ;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+   ;; FIRST BACKTRACE ENTRY: (with-exception-handler
    (with-exception-handler
        (lambda (e)
          (print-backtrace-and-exception/knots e)

tests/backtraces/fibers-map.scm

@@ -7,7 +7,7 @@
          ;; To avoid the test hanging if there's an exception
          (primitive-exit 1))
      (lambda ()
-       ;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+       ;; FIRST BACKTRACE ENTRY: (with-exception-handler
        (with-exception-handler
            (lambda (e)
              (print-backtrace-and-exception/knots e)

tests/backtraces/guile-error-deep-in-thread.scm

@@ -7,7 +7,7 @@
             (+ 1 'a)))         ; LAST BACKTRACE ENTRY HERE
     'unreachable))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/guile-error-in-thread.scm

@@ -1,6 +1,6 @@
 (use-modules (knots))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/nested-parallelism.scm

@@ -30,7 +30,7 @@
 (define result
   (run-fibers
    (lambda ()
-     ;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+     ;; FIRST BACKTRACE ENTRY: (with-exception-handler
      (with-exception-handler
          (lambda (e)
            (print-backtrace-and-exception/knots e)

tests/backtraces/plain-exception.scm

@@ -1,6 +1,6 @@
 (use-modules (knots))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 
 (with-exception-handler
     (lambda (exn)

tests/backtraces/temporary-thread.scm

@@ -1,6 +1,6 @@
 (use-modules (knots))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/triple-with-exception-handler.scm

@@ -1,6 +1,6 @@
 (use-modules (knots))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 
 (with-exception-handler
     (lambda _ #f)

tests/backtraces/vhash-fold-in-thread.scm

@@ -14,7 +14,7 @@
      #f)
     'done))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/vhash-fold.scm

@@ -14,7 +14,7 @@
      #f)
     'done))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)

tests/backtraces/wrapped-exception.scm

@@ -1,6 +1,6 @@
 (use-modules (knots))
 
-;; FIRST BACKTRACE ENTRY: 1762:12    (with-exception-handler
+;; FIRST BACKTRACE ENTRY: (with-exception-handler
 (with-exception-handler
     (lambda (exn)
       (print-backtrace-and-exception/knots exn)