Fix broken versions.yml file in last/train. (#7393)

Here is the long story:

Escape sequences for newline and tab in a shell `tr` command were not
escaped in the script section of the module, causing them to be expanded
in `.command.sh`.

This did not prevent `tr` from doing its job, but this caused the lines
in the script to be indented, like this:

```
    cat <<-END_VERSIONS > versions.yml
    "NFCORE_PAIRGENOMEALIGN:PAIRGENOMEALIGN:PAIRALIGN_M2M:ALIGNMENT_TRAIN":
        last: $(lastdb --version | sed 's/lastdb //')
    END_VERSIONS
```

The indentation broke the herescript, but did not cause the module to
fail.

Therefore, the `versions.yml` file contained one extra line with
`    END_VERSIONS` in it.  This crashes the pipelines that collect the
version numbers, but this was not noticed because `last/train` is always
used with other `last/` submodules, and I was not using `last/train`'s
versions file until today, because I was assuming that the information
would always be redundant.

modules/nf-core/last/train/main.nf

@@ -32,15 +32,15 @@ process LAST_TRAIN {
         $fastx \\
         > ${prefix}.train
 
-    echo "id\tsubstitution_percent_identity\tlast -t\tlast -a\tlast -A\tlast -b\tlast -B\tlast -S"       > ${prefix}.train.tsv
-    printf "\$(basename ${prefix}.train .target.train)\t"                                               >> ${prefix}.train.tsv
-    grep 'substitution percent identity' ${prefix}.train | tail -n 1 | awk '{print \$5}' | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -t' ${prefix}.train | tail -n 1 | awk '{print \$2}'   | sed -e 's/-t//'   | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -a' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -A' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -b' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -B' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\n' '\t' >> ${prefix}.train.tsv
-    grep 'last -S' ${prefix}.train | tail -n 1 | awk '{print \$3}'                                      >> ${prefix}.train.tsv
+    echo "id\tsubstitution_percent_identity\tlast -t\tlast -a\tlast -A\tlast -b\tlast -B\tlast -S"         > ${prefix}.train.tsv
+    printf "\$(basename ${prefix}.train .target.train)\t"                                                 >> ${prefix}.train.tsv
+    grep 'substitution percent identity' ${prefix}.train | tail -n 1 | awk '{print \$5}' | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -t' ${prefix}.train | tail -n 1 | awk '{print \$2}'   | sed -e 's/-t//'   | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -a' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -A' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -b' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -B' ${prefix}.train | tail -n 1 | awk '{print \$3}'                       | tr '\\n' '\\t' >> ${prefix}.train.tsv
+    grep 'last -S' ${prefix}.train | tail -n 1 | awk '{print \$3}'                                        >> ${prefix}.train.tsv
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":

modules/nf-core/last/train/tests/main.nf.test.snap

@@ -74,7 +74,7 @@
                     ]
                 ],
                 "2": [
-                    "versions.yml:md5,c1f06f4162a8b4ee1b8094d967f6678d"
+                    "versions.yml:md5,b2d4a4fce93a910c90768053127969b3"
                 ],
                 "multiqc": [
                     [
@@ -95,14 +95,14 @@
                     ]
                 ],
                 "versions": [
-                    "versions.yml:md5,c1f06f4162a8b4ee1b8094d967f6678d"
+                    "versions.yml:md5,b2d4a4fce93a910c90768053127969b3"
                 ]
             }
         ],
         "meta": {
             "nf-test": "0.9.2",
-            "nextflow": "24.10.3"
+            "nextflow": "24.10.4"
         },
-        "timestamp": "2025-01-22T10:22:21.360808"
+        "timestamp": "2025-01-30T18:37:11.305733"
     }
 }