Remove not needed dsl=2 + error in example (nextflow-io#4812)

Signed-off-by: Marcel Ribeiro-Dantas <mribeirodantas@seqera.io>
Signed-off-by: Niklas Schandry <niklas@bio.lmu.de>

docs/basic.md

@@ -17,41 +17,41 @@ Any process can define one or more channels as *input* and *output*. The interac
 A Nextflow script looks like this:
 
 ```groovy
-// Declare syntax version
-nextflow.enable.dsl=2
-
 // Script parameters
 params.query = "/some/data/sample.fa"
 params.db = "/some/path/pdb"
 
 process blastSearch {
   input:
-    path query
-    path db
+  path query
+  path db
+
   output:
-    path "top_hits.txt"
+  path "top_hits.txt"
 
-    """
-    blastp -db $db -query $query -outfmt 6 > blast_result
-    cat blast_result | head -n 10 | cut -f 2 > top_hits.txt
-    """
+  """
+  blastp -db $db -query $query -outfmt 6 > blast_result
+  cat blast_result | head -n 10 | cut -f 2 > top_hits.txt
+  """
 }
 
 process extractTopHits {
   input:
-    path top_hits
+  path top_hits
+  path db
 
   output:
-    path "sequences.txt"
+  path "sequences.txt"
 
-    """
-    blastdbcmd -db $db -entry_batch $top_hits > sequences.txt
-    """
+  """
+  blastdbcmd -db $db -entry_batch $top_hits > sequences.txt
+  """
 }
 
 workflow {
   def query_ch = Channel.fromPath(params.query)
-  blastSearch(query_ch, params.db) | extractTopHits | view
+  blastSearch(query_ch, params.db)
+  extractTopHits(blastSearch.out, params.db).view()
 }
 ```
 

docs/cli.md

@@ -1433,7 +1433,6 @@ $ nextflow view nextflow-io/hello
 
 == content of file: .nextflow/assets/nextflow-io/hello/main.nf
 #!/usr/bin/env nextflow
-nextflow.enable.dsl=2
 
 process sayHello {
   input:
@@ -1474,7 +1473,6 @@ View the contents of a downloaded pipeline without omitting the header:
 $ nextflow view -q nextflow-io/hello
 
 #!/usr/bin/env nextflow
-nextflow.enable.dsl=2
 
 process sayHello {
   input: